tb_dh.c

/* ==================================================================== * Copyright (c) 2000 The OpenSSL Project. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in * the documentation and/or other materials provided with the * distribution. * * 3. All advertising materials mentioning features or use of this * software must display the following acknowledgment: * "This product includes software developed by the OpenSSL Project * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)" * * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to * endorse or promote products derived from this software without * prior written permission. For written permission, please contact * licensing@OpenSSL.org. * * 5. Products derived from this software may not be called "OpenSSL" * nor may "OpenSSL" appear in their names without prior written * permission of the OpenSSL Project. * * 6. Redistributions of any form whatsoever must retain the following * acknowledgment: * "This product includes software developed by the OpenSSL Project * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)" * * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED * OF THE POSSIBILITY OF SUCH DAMAGE. * ==================================================================== * * This product includes cryptographic software written by Eric Young * (eay@cryptsoft.com). This product includes software written by Tim * Hudson (tjh@cryptsoft.com). * */#include "eng_int.h"/* If this symbol is defined then ENGINE_get_default_DH(), the function that is * used by DH to hook in implementation code and cache defaults (etc), will * display brief debugging summaries to stderr with the 'nid'. *//* #define ENGINE_DH_DEBUG */static ENGINE_TABLE *dh_table = NULL;
staticconstint dummy_nid = 1;
void ENGINE_unregister_DH(ENGINE *e)
{
engine_table_unregister(&dh_table, e);
}
staticvoid engine_unregister_all_DH(void)
{
engine_table_cleanup(&dh_table);
}
int ENGINE_register_DH(ENGINE *e)
{
if(e->dh_meth)
return engine_table_register(&dh_table,
engine_unregister_all_DH, e, &dummy_nid, 1, 0);
return 1;
}
void ENGINE_register_all_DH()
{
ENGINE *e;
for(e=ENGINE_get_first() ; e ; e=ENGINE_get_next(e))
ENGINE_register_DH(e);
}
int ENGINE_set_default_DH(ENGINE *e)
{
if(e->dh_meth)
return engine_table_register(&dh_table,
engine_unregister_all_DH, e, &dummy_nid, 1, 1);
return 1;
}
/* Exposed API function to get a functional reference from the implementation * table (ie. try to get a functional reference from the tabled structural * references). */
ENGINE *ENGINE_get_default_DH(void)
{
return engine_table_select(&dh_table, dummy_nid);
}
/* Obtains an DH implementation from an ENGINE functional reference */const DH_METHOD *ENGINE_get_DH(const ENGINE *e)
{
return e->dh_meth;
}
/* Sets an DH implementation in an ENGINE structure */int ENGINE_set_DH(ENGINE *e, const DH_METHOD *dh_meth)
{
e->dh_meth = dh_meth;
return 1;
}